I don't know how to emulate joystick controls.

Keyboard controls (as I could discover them) are as follows:

A - Increase speed.
Z - Decrease speed.
L - Move left. (Doesn't work unless moving.)
; (semicolon) - Move right. (Doesn't work unless moving.)
1 - Fire forward lasers. (Some enemies are immune.)
2 - Dump oil slick behind you. (Not available at start.)

The blue-and-black bar at the bottom seems to contain indicators for what abilities, such as the forward laser, that you have.

Enemy traffic will be intermixed with civilian traffic. Most enemies seem to drive blue cars, but the blue Volkswagen Beetles seem to be civilians.

Enemies will attempt to crash into you and run you off the road.

If the Tractor Trailer truck shows up while you're still alive, then it has a new ability to give you. Drive carefully into the back of it.

You have a limited number of lives. Losing a life will cause you to lose any extra abilities you had acquired.